Question Fans run at full speed forever after shutdown, PSU fan is also on, GPU fans are off ?

[ynng]

When the PC is on, everything is fine.

But when I turn it off/sleep/hibernate, it would do that, monitors go black, USB loses power.
But right after, the CPU and chassis fans would start spinning at full speed. The PSU fans are also spinning, but not at full speed.
The motherboard RGB lights are still on, the GPU fan is not.

If I press the power button, the fans slow down and the PC boots normally.

The only temporary fix that has worked is to flick the PSU switch off, then on.

Things I tried:
Switching operating system (Tried windows 10 and Ubuntu)
Resetting and Updating BIOS

Spec:
Ryzen 5600
Asrock B450 Steel Legend
GTX 1080
EVGA 750BQ

 

[Fix_that_Glitch]

Try removing the motherboard battery for a minute or two. Then replace it. See if this helps at all.

 

[ynng]

Try removing the motherboard battery for a minute or two. Then replace it. See if this helps at all.

Thanks for the suggestion, but that didn't work.

Something else that I just noticed after reinstalling the battery:
When my PC gets stuck in the "fan max speed" state, nothing happens if I press/long hold the power button.

Not sure if there is causation or this is just random.

 

[Fix_that_Glitch]

When you shut down/put to sleep or hibernate is this by using the windows shut down or sign out panel?